The utility model relates to a visit narrow and small space dismouting quick -operation joint's instrument pincers, include the long handle pincers that constitute by the pincers body and pincers mouth, its characterized in that: the fulcrum rear portion of the pincers body is the long handle, the long handle has crooked position, with the open one -hand operation of adaptive control pincers mouth, be equipped with the breach that holds the cable and pass through, form the structure of dodging to the cable in pincers mouth department, there be the with notch nut in the department welding of pincers mouth, form pincers mouth expansion interface, through pincers mouth expansion interface swing joint extension characteristic pincers mouth forms the formula of easily installing and removing extension characteristic pincers mouth structure, extension characteristic pincers mouth is held piece two parts by construction bolt and characteristic extension and is constituted, and the construction bolt is connected with pincers mouth expansion interface, and the characteristic extension is held piece fixed connection and on the construction bolt, is formed and visit the narrow and small downthehole clamping structure who carries out the centre gripping to quick -operation joint in depths. The utility model discloses can be deep enough carry out various quick -operation joint dismouting to narrow and small downthehole portion, have and protect that aviation connector is not led astray, the installation characteristics and the beneficial effect of high quality of parts.